2 * linux/arch/arm/mach-pxa/pxa27x.c
4 * Author: Nicolas Pitre
5 * Created: Nov 05, 2002
6 * Copyright: MontaVista Software Inc.
8 * Code specific to PXA27x aka Bulverde.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 #include <linux/module.h>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/suspend.h>
18 #include <linux/platform_device.h>
19 #include <linux/sysdev.h>
21 #include <mach/hardware.h>
23 #include <mach/irqs.h>
24 #include <mach/pxa-regs.h>
25 #include <mach/pxa2xx-regs.h>
26 #include <mach/mfp-pxa27x.h>
27 #include <mach/reset.h>
28 #include <mach/ohci.h>
37 void pxa27x_clear_otgph(void)
39 if (cpu_is_pxa27x() && (PSSR & PSSR_OTGPH))
42 EXPORT_SYMBOL(pxa27x_clear_otgph);
44 /* Crystal clock: 13MHz */
45 #define BASE_CLK 13000000
48 * Get the clock frequency as reflected by CCSR and the turbo flag.
49 * We assume these values have been applied via a fcs.
50 * If info is not 0 we also display the current settings.
52 unsigned int pxa27x_get_clk_frequency_khz(int info)
54 unsigned long ccsr, clkcfg;
55 unsigned int l, L, m, M, n2, N, S;
59 cccr_a = CCCR & (1 << 25);
61 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
62 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
63 t = clkcfg & (1 << 0);
64 ht = clkcfg & (1 << 2);
65 b = clkcfg & (1 << 3);
69 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
73 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
77 printk( KERN_INFO "Run Mode clock: %d.%02dMHz (*%d)\n",
78 L / 1000000, (L % 1000000) / 10000, l );
79 printk( KERN_INFO "Turbo Mode clock: %d.%02dMHz (*%d.%d, %sactive)\n",
80 N / 1000000, (N % 1000000)/10000, n2 / 2, (n2 % 2)*5,
82 printk( KERN_INFO "Memory clock: %d.%02dMHz (/%d)\n",
83 M / 1000000, (M % 1000000) / 10000, m );
84 printk( KERN_INFO "System bus clock: %d.%02dMHz \n",
85 S / 1000000, (S % 1000000) / 10000 );
88 return (t) ? (N/1000) : (L/1000);
92 * Return the current mem clock frequency in units of 10kHz as
93 * reflected by CCCR[A], B, and L
95 unsigned int pxa27x_get_memclk_frequency_10khz(void)
97 unsigned long ccsr, clkcfg;
98 unsigned int l, L, m, M;
102 cccr_a = CCCR & (1 << 25);
104 /* Read clkcfg register: it has turbo, b, half-turbo (and f) */
105 asm( "mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg) );
106 b = clkcfg & (1 << 3);
109 m = (l <= 10) ? 1 : (l <= 20) ? 2 : 4;
112 M = (!cccr_a) ? (L/m) : ((b) ? L : (L/2));
118 * Return the current LCD clock frequency in units of 10kHz as
120 static unsigned int pxa27x_get_lcdclk_frequency_10khz(void)
123 unsigned int l, L, k, K;
128 k = (l <= 7) ? 1 : (l <= 16) ? 2 : 4;
136 static unsigned long clk_pxa27x_lcd_getrate(struct clk *clk)
138 return pxa27x_get_lcdclk_frequency_10khz() * 10000;
141 static const struct clkops clk_pxa27x_lcd_ops = {
142 .enable = clk_cken_enable,
143 .disable = clk_cken_disable,
144 .getrate = clk_pxa27x_lcd_getrate,
147 static struct clk pxa27x_clks[] = {
148 INIT_CK("LCDCLK", LCD, &clk_pxa27x_lcd_ops, &pxa_device_fb.dev),
149 INIT_CK("CAMCLK", CAMERA, &clk_pxa27x_lcd_ops, NULL),
151 INIT_CKEN("UARTCLK", FFUART, 14857000, 1, &pxa_device_ffuart.dev),
152 INIT_CKEN("UARTCLK", BTUART, 14857000, 1, &pxa_device_btuart.dev),
153 INIT_CKEN("UARTCLK", STUART, 14857000, 1, NULL),
155 INIT_CKEN("I2SCLK", I2S, 14682000, 0, &pxa_device_i2s.dev),
156 INIT_CKEN("I2CCLK", I2C, 32842000, 0, &pxa_device_i2c.dev),
157 INIT_CKEN("UDCCLK", USB, 48000000, 5, &pxa27x_device_udc.dev),
158 INIT_CKEN("MMCCLK", MMC, 19500000, 0, &pxa_device_mci.dev),
159 INIT_CKEN("FICPCLK", FICP, 48000000, 0, &pxa_device_ficp.dev),
161 INIT_CKEN("USBCLK", USBHOST, 48000000, 0, &pxa27x_device_ohci.dev),
162 INIT_CKEN("I2CCLK", PWRI2C, 13000000, 0, &pxa27x_device_i2c_power.dev),
163 INIT_CKEN("KBDCLK", KEYPAD, 32768, 0, &pxa27x_device_keypad.dev),
165 INIT_CKEN("SSPCLK", SSP1, 13000000, 0, &pxa27x_device_ssp1.dev),
166 INIT_CKEN("SSPCLK", SSP2, 13000000, 0, &pxa27x_device_ssp2.dev),
167 INIT_CKEN("SSPCLK", SSP3, 13000000, 0, &pxa27x_device_ssp3.dev),
168 INIT_CKEN("PWMCLK", PWM0, 13000000, 0, &pxa27x_device_pwm0.dev),
169 INIT_CKEN("PWMCLK", PWM1, 13000000, 0, &pxa27x_device_pwm1.dev),
171 INIT_CKEN("AC97CLK", AC97, 24576000, 0, NULL),
172 INIT_CKEN("AC97CONFCLK", AC97CONF, 24576000, 0, NULL),
175 INIT_CKEN("MSLCLK", MSL, 48000000, 0, NULL),
176 INIT_CKEN("USIMCLK", USIM, 48000000, 0, NULL),
177 INIT_CKEN("MSTKCLK", MEMSTK, 19500000, 0, NULL),
178 INIT_CKEN("IMCLK", IM, 0, 0, NULL),
179 INIT_CKEN("MEMCLK", MEMC, 0, 0, NULL),
185 #define SAVE(x) sleep_save[SLEEP_SAVE_##x] = x
186 #define RESTORE(x) x = sleep_save[SLEEP_SAVE_##x]
189 * List of global PXA peripheral registers to preserve.
190 * More ones like CP and general purpose register values are preserved
191 * with the stack pointer in sleep.S.
201 void pxa27x_cpu_pm_save(unsigned long *sleep_save)
210 void pxa27x_cpu_pm_restore(unsigned long *sleep_save)
215 PSSR = PSSR_RDH | PSSR_PH;
221 void pxa27x_cpu_pm_enter(suspend_state_t state)
223 extern void pxa_cpu_standby(void);
225 /* ensure voltage-change sequencer not initiated, which hangs */
228 /* Clear edge-detect status register. */
231 /* Clear reset status */
232 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
235 case PM_SUSPEND_STANDBY:
239 pxa27x_cpu_suspend(PWRMODE_SLEEP);
244 static int pxa27x_cpu_pm_valid(suspend_state_t state)
246 return state == PM_SUSPEND_MEM || state == PM_SUSPEND_STANDBY;
249 static int pxa27x_cpu_pm_prepare(void)
251 /* set resume return address */
252 PSPR = virt_to_phys(pxa_cpu_resume);
256 static void pxa27x_cpu_pm_finish(void)
258 /* ensure not to come back here if it wasn't intended */
262 static struct pxa_cpu_pm_fns pxa27x_cpu_pm_fns = {
263 .save_count = SLEEP_SAVE_COUNT,
264 .save = pxa27x_cpu_pm_save,
265 .restore = pxa27x_cpu_pm_restore,
266 .valid = pxa27x_cpu_pm_valid,
267 .enter = pxa27x_cpu_pm_enter,
268 .prepare = pxa27x_cpu_pm_prepare,
269 .finish = pxa27x_cpu_pm_finish,
272 static void __init pxa27x_init_pm(void)
274 pxa_cpu_pm_fns = &pxa27x_cpu_pm_fns;
277 static inline void pxa27x_init_pm(void) {}
280 /* PXA27x: Various gpios can issue wakeup events. This logic only
281 * handles the simple cases, not the WEMUX2 and WEMUX3 options
283 static int pxa27x_set_wake(unsigned int irq, unsigned int on)
285 int gpio = IRQ_TO_GPIO(irq);
288 if (gpio >= 0 && gpio < 128)
289 return gpio_set_wake(gpio, on);
291 if (irq == IRQ_KEYPAD)
292 return keypad_set_wake(on);
313 void __init pxa27x_init_irq(void)
315 pxa_init_irq(34, pxa27x_set_wake);
316 pxa_init_gpio(128, pxa27x_set_wake);
320 * device registration specific to PXA27x.
323 static struct resource i2c_power_resources[] = {
327 .flags = IORESOURCE_MEM,
331 .flags = IORESOURCE_IRQ,
335 struct platform_device pxa27x_device_i2c_power = {
336 .name = "pxa2xx-i2c",
338 .resource = i2c_power_resources,
339 .num_resources = ARRAY_SIZE(i2c_power_resources),
342 void __init pxa27x_set_i2c_power_info(struct i2c_pxa_platform_data *info)
347 pxa27x_device_i2c_power.dev.platform_data = info;
350 static struct platform_device *devices[] __initdata = {
357 &pxa27x_device_i2c_power,
365 static struct sys_device pxa27x_sysdev[] = {
367 .cls = &pxa_irq_sysclass,
369 .cls = &pxa2xx_mfp_sysclass,
371 .cls = &pxa_gpio_sysclass,
375 static int __init pxa27x_init(void)
379 if (cpu_is_pxa27x()) {
383 clks_register(pxa27x_clks, ARRAY_SIZE(pxa27x_clks));
385 if ((ret = pxa_init_dma(32)))
390 for (i = 0; i < ARRAY_SIZE(pxa27x_sysdev); i++) {
391 ret = sysdev_register(&pxa27x_sysdev[i]);
393 pr_err("failed to register sysdev[%d]\n", i);
396 ret = platform_add_devices(devices, ARRAY_SIZE(devices));
402 postcore_initcall(pxa27x_init);